Two-degree-of-freedom vortex induced vibrations (2DOF VIVs) of a circular cylinder
controlled by synthetic jets in laminar flow are numerically investigated. The influence of
synthetic jet orientation angle and phase difference on the oscillation characteristics,
hydrodynamic forces and vortex shedding are discussed. The acting mechanisms of
synthetic jets are also revealed. The numerical results show that the synthetic jet orientation
angle is a key factor, which can determine whether the oscillation of the circular cylinder is …

In order to understand the effects of synthetic jets on the active control of two-degree-of-
freedom (2DOF) vortex-induced vibrations (VIVs) of a circular cylinder, a series of numerical
simulation were carried out at Reynolds number of 150. The synthetic jet excitation
frequency was fixed at five times of the natural frequency of the cylinder in still water. The
influence of two key parameters of synthetic jets, the position angle (α) and the momentum
coefficient (Cu), on 2DOF VIVs was analyzed. Results indicated that both in-flow oscillation …